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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
agricultural and biological sciences
Overexpression of wheat dehydrin DHN-5 enhances tolerance to salt and osmotic stress in Arabidopsis thaliana
Plant Cell Reports, Volume 26, No. 11, Year 2007
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Description
Late Embryogenesis Abundant (LEA) proteins are associated with tolerance to water-related stress. A wheat (Triticum durum) group 2 LEA proteins, known also as dehydrin (DHN-5), has been previously shown to be induced by salt and abscisic acid (ABA). In this report, we analyze the effect of ectopic expression of Dhn-5 cDNA in Arabidopsis thaliana plants and their response to salt and osmotic stress. When compared to wild type plants, the Dhn-5 transgenic plants exhibited stronger growth under high concentrations of NaCl or under water deprivation, and showed a faster recovery from mannitol treatment. Leaf area and seed germination rate decreased much more in wild type than in transgenic plants subjected to salt stress. Moreover, the water potential was more negative in transgenic than in wild type plants. In addition, the transgenic plants have higher proline contents and lower water loss rate under water stress. Also, Na+ and K+ accumulate to higher contents in the leaves of the transgenic plants. Our data strongly support the hypothesis that Dhn-5, by its protective role, contributes to an improved tolerance to salt and drought stress through osmotic adjustment. © 2007 Springer-Verlag.
Authors & Co-Authors
Brini, Faïçal
Tunisia, Sfax
Centre de Biotechnologie de Sfax
Hanin, Moez
Tunisia, Sfax
Centre de Biotechnologie de Sfax
Lumbreras, Victoria
Spain, Barcelona
Csic - Centro de Investigación y Desarrollo Pascual Vila Cid
Amara, Imen
Tunisia, Sfax
Centre de Biotechnologie de Sfax
Khoudi, Habib
Tunisia, Sfax
Centre de Biotechnologie de Sfax
Hassaïri, Afif
Tunisia, Sfax
Centre de Biotechnologie de Sfax
Pagès, Montserrât
Spain, Barcelona
Csic - Centro de Investigación y Desarrollo Pascual Vila Cid
Masmoudi, Khaled
Tunisia, Sfax
Centre de Biotechnologie de Sfax
Statistics
Citations: 241
Authors: 8
Affiliations: 2
Identifiers
Doi:
10.1007/s00299-007-0412-x
ISSN:
07217714
Research Areas
Environmental
Genetics And Genomics